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No. 624,749. Patented May'9, I899.

- J. A. BURB.

LAWN MOWER.

(Application filed Sept. 8, 1898.)

(No Model.)

I! II! III NTED STATES PATENT OFFICE.

JOHN ALBERT BURR, OF AGAWAM, MASSACHUSETTS, ASSIGNOR OF THREE- FOURTI-ISTO OSCAR L. KING, OF SAME PLACE.

LAWN-MOWER.

SPECIFICATION forming part of Letters Patent No. 624,749, dated May 9,1899. Application filed September 8, 1898. Serial No. 690,464. (Nomodel.)

To aZZ whom, it may concern.-

Be it known that 1, JOHN ALBERT BURR, a citizen of the United States ofAmerica, and a resident of Agawam, in the county of Hampden and State ofMassachusetts, have invented certain new and useful Improvements inLawn-Mowers, of which the followingis a full, clear, and exactdescription.

This invention relates to improvements in lawn-mowers of the most commontype, comprising traction-wheels and a rotary cutter or shear operatingin conjunction with a fixed bar relative to which the curved knife ofthe rotary cutter has shearing actions.

The object of my invention is to provide a casing which wholly inclosesthe operatinggearing so as to prevent it from becoming choked by thegrass or clogged by obstructions of any kind.

The improved lawn-mower is illustrated in the accompanyingdrawings, inwhich- Figure 1 is aplan and partial horizontal section of the machine,Fig. 2 being a side elevation with a portion of one of the side cheekmembers broken away for clearer illustration.

Similar characters of reference indicate corresponding parts in bothViews.

A A represent the traction-wheels, fixed on the end portion of the shaftB, outside of which are the cheek-plates or castings C C, the yoke andhandle D being provided in the usual manner for pushing or drawing thelawnmower.

The traction-wheels are constructed with comparatively wide rims andwith a web or spokes a uniting the hub portion thereof with the rim, thehub portion a being comparatively narrow, so that the circularportion 1) of each cheek-plate may be well disposed within the cup-liketraction-wheels.

Each cheek-plate C has the forward portions d d thereof outwardlyoffset, as more plainly seen in Fig. 1, these standing consid* erablyoutwardly beyond the outer faces of the traction-wheels and supportbetween them the cen tral shaft f of the rotary cutter G, whichcomprises the shearing knives or blades h, constructed as usual, withthe exception that they are unusually long, being longer than thedistance between the outer faces of the wheels A A. These cheek-plateextensions (1 cl also support between them the counter-shaft z' and thefixed bar j of the cutter, and the groundroller k is hung in theadjusting-arms m m.

Loosely mounted on the shaft B is the gearwheel 0, having as a partthereof the ratchetwheel 0 a spring-pawl 0 provided on the inner face ofone of the'traction-wheels, engaging in the teeth of said ratchet-wheelo for causing the rotation of the said gear-wheel o in unison with theturning of the tractionwheels when the latter roll forwardly as themachine is pushed in its work.

The gear-wheel p on the counter-shaft z' is in mesh with the gear-wheel0, wheel 10 being of less diameter than the one 0, whereby the forwardrotations of the latter will cause faster rotation of the wheel 19 andthe counter-shaft, which has also thereon, near its outer end, thegear-wheel g, which is in mesh with the gearwheel 23, affixed to thearbor or shaft f of the rotary cutter.

The cheek-plate extension cl at one side of the machine is formedchambered, as seen at d the same comprising the inner wall or face 10and the marginal rib 12, against which latter the cap-plate 13 isscrewed or otherwise secured, and a casing in the form of a chamberedshell or casting (indicated at u) is provided to inclose the gearing atp 0 0 &c., the same being supported upon the shafts B i, as seen in Fig.1.

By makingthe side cheek-plates with the forward extension members (1 ddecidedly outwardly offset beyond the outer faces of the traction-wheelsprovides for the mounting between the forward ends of the checks of arotary cutter having a length quite a little exceeding the distancebetween the outer faces of the traction-wheels, and hence it becomespossible to cut the grass more closely to a building or other objectthan would be possible were the ends of the rotary cutter disposedwithin the planes coincident with the outer faces of the said wheels,and it will be seen that in the use of the machine its every pass willcut. the grass in a path wider than that comprised between thetraction-wheels, so that the disadvantage of havingone of the wheels beddown the grass just outside of the cut path or swath at every pass isovercome.

Having thus described my invention, what I claim, and desire to secureby Letters Patto extend into the: recesseson t-heouter sides ent, isofthe wheels, and which: cheek-plates are pro- In a lawn-mower, the shaftB, the driving vided with the outward extensions, the gears Wheelssecured thereto and having recesses q, t, secured to the ends of theshafts '21, f, and

5 formed in their sides, the shafts i, f, extendthe cap-plate 13, whichcloses over the gears,

ing parallel with the shaft B, thegearso, 19, sesubstantially asspecified.

cured to the shafts B', 'i, the pawlland ratchet, Signedby me, atSpringfield, Massachusetts,

and the casing at which incloses the gears; and this 31st day of August,1898.

has the circular flange upon its inner side eX- JOHN ALBERT BURR. 1otending into the recess of the Wheel A, COIII- Vitnesses:

bined with the cheek-plates which form bear- OSCAR L. KING, ings for theshafts B, i, and which 'are made WM. S. BELLOWS.

